Negative balance protection ensures that your account will not be negative even if markets move quickly against your trades. This is particularly important for new traders who are unfamiliar with how quickly markets move during announcements, market openings, or general market volatility.
Negative balance protection prevents traders with losing positions from ending up with a negative balance in their forex trading account. If you're in a bad trade and losing money quickly, a margin call can keep you from going into debt. Simply put, a margin call closes your rapidly declining open positions.

Negative balance protection (NBP) is a feature offered by many trading platforms to prevent traders from losing more money than they initially deposited into their accounts. In highly volatile markets like forex or CFDs (Contracts for Difference), rapid price movements can lead to significant losses, potentially exceeding the trader's account balance.

NBP ensures that, in such scenarios, the trader's account balance cannot drop below zero. If losses surpass the deposited amount, the broker absorbs the excess loss instead of passing it on to the trader.

This feature is particularly beneficial for retail traders, as it provides a safety net against unexpected market risks. Many regulators, such as the European Securities and Markets Authority (ESMA), mandate negative balance protection for brokers.